It was announced yesterday that Andries Jonker's time as Arsenal academy manager has come to an end, with the Dutchman electing to take up an offer to become Wolfsburg's new manager, but how did he fare overall during his spell with the Gunners?

In terms of results on the field, Arsenal have had mixed fortunes since Jonker's arrival in July 2014.

The U23s are now in the top tier but only after spending a season in the second division, while the U18s, as ever, are impressive going forwards but extremely vulnerable at the back.

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It is at U19 level, though, where the biggest concerns were raised about Jonker's coaching capabilities, with the club having been unable to make much progress in the UEFA Youth League, while they were eliminated from the competition at the group stages this season.

With regards to work off the pitch, however, there is much to admire about what Jonker did, especially when the club's signings of talented prospects from abroad are taking into consideration.

Jeff Reine-Adelaide is one of the success stories of Jonker's Arsenal stint

Jeff Reine-Adelaide is already part of the first-team squad, while Donyell Malen, Vlad Dragomir, Kelechi Nwakali and Yassin Fortune are all exciting talents who have the potential to join him in the not too distant future.

Jonker was direct in his approach and encouraged the young Gunners to play in a different style that saw them pass the ball more quickly, while many of Arsenal's prospects also appeared more able to cope physically during Jonker's tenure than under previous regimes.

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While Jonker did much good work with the Arsenal academy, his departure is rather ill timed. Had he left at the end of the season, the club would have had the summer to contemplate who his successor should be.

Now, though, Jonker has left a void at the club that needs filling. Luke Hobbs has taken over on an interim basis but Arsenal must make the right decision regarding who Jonker's permanent successor will be.